ArticleClinical and translational science2024
Endogenous plasma riboflavin is not a viable BCRP biomarker in human.
Article in Clinical and translational science, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
4 citing papers in PubMed.
- Endogenous Biomarkers to Evaluate Transporter-Mediated Drug-Drug Interactions: Current Evidence, Impact on Clinical Pharmacology Strategy, Remaining Gaps, and Future Directions.Journal of clinical pharmacology · 2026Review
- Monitoring of Metabolic Disorders Through Electro-Sensing of Riboflavin by Novel Super-Conductive Silver Ink Modified Paper.Analytical science advances · 2026Article
- Identification and Clinical Evaluation of Potential Biomarkers for Breast Cancer Resistance Protein (BCRP/ABCG2).Clinical pharmacology and therapeutics · 2025Article
- Endogenous plasma riboflavin is not a viable BCRP biomarker in human.Clinical and translational science · 2024Article
Corrections and comments
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Authors and funding
7 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Recent reports suggest that plasma riboflavin may serve as a biomarker for BCRP inhibition in humans. However, the clinical data supporting this claim have been limited, with only two studies showing modest increases in riboflavin levels after administration of a BCRP inhibitor. We have recently demonstrated that co-administration of 375 mg once daily (q.d.) cedirogant, an in vitro BCRP inhibitor, significantly increased rosuvastatin (an OATP1B1/1B3 and BCRP substrate) exposures but did not change the levels of the OATP1B endogenous biomarker coproporphyrin-I, demonstrating that cedirogant is a clinical BCRP inhibitor. Samples from this same cedirogant clinical drug-drug interaction study were utilized to test the hypothesis that endogenous plasma riboflavin is a biomarker of BCRP inhibition. Plasma riboflavin levels in the absence of cedirogant ranged from 1 to 10 ng/mL across the 11 participants analyzed with minimal (<20%) intrasubject variability over a 24-hour interval. Contrary to expectations, 375 mg q.d. oral administration of cedirogant did not increase riboflavin levels. These data strongly suggest that endogenous plasma riboflavin is not a viable biomarker for BCRP inhibition in humans.
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Registered trials
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